How many K is Blue in MH

Discussion in 'Metal Halide Aquarium Lighting' started by jmc2009209, Jan 19, 2011.

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  1. jmc2009209

    jmc2009209 Flamingo Tongue

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    How many K is blue in mh, I heard its 20k i don't know for sure but i want some blue for my halide system. If anyone know let me know thanks.
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  3. saints fan 420

    saints fan 420 Snowflake Eel

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    20k is blue...14k is blue/white kinda a purpleish white color....and 10k yellow/whiteish

    some ballasts burn the 20k a little whiter as well..
  4. FaceOfDeceit

    FaceOfDeceit Hockey Beard

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    Different brand bulbs will appear more blue than others at the same K rating.
  5. jmc2009209

    jmc2009209 Flamingo Tongue

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    I want some true purple, And true blue whitish. Does ballast hold any mh bulbs at different K but same watts
  6. saints fan 420

    saints fan 420 Snowflake Eel

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    what ballast do you have..or what fixture do you have..i have a 20k xm and it burns a little whiter on my sunpod ballast at around 300watts even tho its a 250w fixture and ballast..
  7. sostoudt

    sostoudt Giant Squid

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  9. gcarroll

    gcarroll Montipora Digitata

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    Very few manufacturers actually rate their bulbs using the true K temp that they measure out to. No one markets a true 20K bulb because it would still appear white to the human eye. Any bulb that a human can see the slightest amount of blue is well past 30K on a spectrometer. Most manufacturers just pull Kelvin temps out of their @#$! For example one of my favorite bulbs the Phoenix 14K is bluer than many 20K. All in all it just depends on the manufacturer.
  10. GuitarMan89

    GuitarMan89 Giant Squid

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    The bulb depends on many different things including manufacture, kelvin rating, ballast used, wattage and age. What exactly are you looking for?
  11. missionsix

    missionsix Super Moderator Staff Member

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    I had a hard time finding a good combination of ballast to bulb in a 20k for my mh. I tried the sps blue life 20k and an Ushio 20k on my lumatek ballasts. I did find that actinic bulbs bought in the 420nm range give a jumpstart towards more of a violet/purplish hue. 460nm actinics are more of a true blue color:(

    I didn't care for the above combination of ballast to mh lamp though. Never gave me the look I was after.